Or search: affinity, aggression, armor, armour, attraction, baseball, bludgeon, brunt, coerce, cohesion, commando, compact, compel, compress, constabulary
2 Syllables: SU
boris, brokerage, coarsest, coleridge, cornice, cornish, corpses, courses, doris, forage, forest, forges, formless, georges, gorges, horace, horses, mornings, morris, mortgage, mortis, norris, norwich, orbis, porches, portage, shortage, shortest, sportive, storage, torches, warnings
3 Syllables: SUU
discourses
3 Syllables: USU
abortive, divorces, enforces, enormous, recordings, supportive
4 Syllables: UUSU
nonconformist, reinforces

Found 41 words across 4 groupings. Skipped 3 excess words of a similar stem.